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母血清甲胎蛋白的浓度是产前决定是否需用超声波或羊水穿刺来诊断神经管缺陷、腹壁缺陷和双胎的依据。达到或超过此浓度决定作羊水穿刺孕妇血清甲胎蛋白浓度(羊水穿刺临界水平,Amnio-centesis cutoff levels)可因一些因素影响而不同。
Maternal serum alpha-fetoprotein concentration is prenatal decision whether to use ultrasound or amniocentesis to diagnose neural tube defects, abdominal wall defects and twins basis. At or above this concentration, the serum alpha-fetoprotein concentration (amnio-centesis cutoff levels) for amniocentesis may vary depending on a number of factors.